Finding the Third Proportional to 290,410 and 629,077.50

Step by Step Solution

1. Step 1: Write the proportion equation
   290,410 : 629,077.50 = 629,077.50 : x
2. Step 2: Convert to fraction form
   290,410/629,077.50 = 629,077.50/x
3. Step 3: Cross multiply
   290,410x = 629,077.50 × 629,077.50
4. Step 4: Simplify right side
   290,410x = 395,738,501,006.25
5. Step 5: Solve for x
   x = 395,738,501,006.25/290,410
6. Step 6: Final answer
   x = 1,362,688.96